/**
******************************************************************************************
* @file ChangeSoundThreshold.c
* @brief Command for change the threshold of sound.
* @date 12 avril 2015
* @author Benjamin Lancinot
*****************************************************************************************/
/* COPYRIGHT ****************************************************************************
*****************************************************************************************
* Copyright (c) 2015, Audrey LOISEAU and Benjamin LANCINOT.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
*    list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
*    this list of conditions and the following disclaimer in the documentation
*    and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************************************/

#include "ChangeSoundThreshold.h"

/*******************************************************************************************
* PROTOYPES
********************************************************************************************/

void ChangeSoundThreshold_destroy(Command **);

float convertDecibelToSoundIntensity(float);

void ChangeSoundThreshold_execute(Command *, char*);

/*******************************************************************************************
* FUNCTIONS
********************************************************************************************/

/**
 * @brief Constructor
 * @param value Pointer to the threshold of sound which must be modifying
 * @return Pointer to a new Command
 **/
Command* ChangeSoundThreshold_create(Protected_data* value){
        Command* This = (Command *) malloc(sizeof(*This));


        //Init functions
        This->execute = ChangeSoundThreshold_execute;
	This->destroy = ChangeSoundThreshold_destroy;
        This->valueToChange =  value;

	return This;
}

/**
 * @brief Destructor
 * @param This Double pointer to the wanted Command
 **/
void ChangeSoundThreshold_destroy(Command ** This){
	if (NULL != *This) {
		free(*This);
		*This = NULL;
	}
}


/**
 * @brief Calculate the decibel value in sound intensity
 * @param inDB Value in DB
 * @return Value in sound intensity
 **/
float convertDecibelToSoundIntensity(float inDB){
        float result;
	result	= (inDB/10)-12;
	result	= pow(10,result);
        return result;
}


/**
 * @brief Change the threshold of sound
 * @param This Pointer to the wanted ChangeSoundThreshold
 * @param newThreshold Pointer to the new threshold
 **/
void ChangeSoundThreshold_execute(Command * This, char* newThreshold){
        Protected_data* data =  (Protected_data*) This->valueToChange;
        pthread_mutex_lock(&data->mutex);
        float a;
        a = atof(newThreshold);
        //Convert char* in float with atof. Then convert dB value in sound intensity
        data->value[0] = convertDecibelToSoundIntensity(a);
        pthread_mutex_unlock(&data->mutex);
}

